refactor(actions): split movements into multiple modules

lua/nvim-tree/actions/moves/item.lua

@@ -0,0 +1,55 @@
+local utils = require "nvim-tree.utils"
+local view = require "nvim-tree.view"
+local core = require "nvim-tree.core"
+local lib = require "nvim-tree.lib"
+
+local M = {}
+
+function M.fn(where, what)
+  return function()
+    local node_cur = lib.get_node_at_cursor()
+    local nodes_by_line = utils.get_nodes_by_line(core.get_explorer().nodes, core.get_nodes_starting_line())
+
+    local cur, first, prev, nex = nil, nil, nil, nil
+    for line, node in pairs(nodes_by_line) do
+      local valid = false
+      if what == "git" then
+        valid = node.git_status ~= nil
+      elseif what == "diag" then
+        valid = node.diag_status ~= nil
+      end
+
+      if not first and valid then
+        first = line
+      end
+
+      if node == node_cur then
+        cur = line
+      elseif valid then
+        if not cur then
+          prev = line
+        end
+        if cur and not nex then
+          nex = line
+          break
+        end
+      end
+    end
+
+    if where == "prev" then
+      if prev then
+        view.set_cursor { prev, 0 }
+      end
+    else
+      if cur then
+        if nex then
+          view.set_cursor { nex, 0 }
+        end
+      elseif first then
+        view.set_cursor { first, 0 }
+      end
+    end
+  end
+end
+
+return M